Pair of shelves for a cooking grill



FIG. 1 is a perspective view of a pair of shelves for a cooking grill showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a side view thereof; and,

FIG. 6 is a bottom plan view thereof.

The details shown in broken lines form no part of the claimed design. 

I claim the ornamental design for a pair of shelves for a cooking grill, as shown and described. 